Why the dashboard airbag light is on in your Hyundai XG300?
The SRS MIL is not illuminated in my Hyundai XG300, but if it is
on your vehicle, I'd take it to a shop. Chances are some of your
personal items collected under one of the front seats
and...displaced the side airbag harness a little; causing a
resistence high code to set. But it is just a guess.